#include<stdlib.h>
#include<stdio.h>
#include<sys/types.h>
#include<sys/stat.h>
#include<unistd.h>

int main(int argc,char **argv){

//    execl("/bin/ls","ls","-l",NULL);
//    execlp("ls","ls","-l",NULL);
    execlp("date","date","+%F_%T",NULL);
    perror("because");
   printf(" this is a test \n");
   




   return 0;
}